libstdc++-v3/ChangeLog

   1 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/bits/shared_ptr.h: Improve docs.
   4         * include/bits/shared_ptr_base.h: Likewise.
   5         * include/bits/stl_uninitialized.h: Likewise.
   6         * include/bits/unique_ptr.h: Likewise.
   7         * libsupc++/new: Likewise.
   8
   9 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
  10
  11         * include/bits/stl_deque.h
  12         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
  13         Make hidden friend.
  14         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
  15         Likewise.
  16         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
  17         Likewise.
  18         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
  19         Likewise.
  20         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
  21         Likewise.
  22         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
  23         Likewise.
  24         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
  25         copy elision.
  26         (_Deque_iterator<>::operator-(difference_type)): Likewise.
  27
  28 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
  29
  30         PR libstdc++/90277
  31         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
  32         (test01): Reserve for number of insertions to avoid rehash during test.
  33         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
  34         (test01): Likewise.
  35         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
  36         (test01): Likewise.
  37         (test02): Likewise.
  38         (test03): Likewise.
  39
  40 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
  41
  42         * include/experimental/bits/fs_path.h: Improve docs.
  43         * include/experimental/bits/net.h: Fix wrong header name in comment.
  44         Do not document implementation details.
  45         * include/experimental/netfwd: Fix doxygen grouping.
  46
  47 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
  48
  49         * include/bits/stl_pair.h: Improve docs.
  50         * include/std/tuple: Likewise.
  51
  52         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
  53         inline namespace.
  54         * include/std/chrono: Improve docs.
  55         * include/std/ratio: Do not document implementation details.
  56         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
  57         line numbers.
  58         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
  59
  60         PR libstdc++/89102
  61         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
  62         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
  63         (__duration_common_type): New helper.
  64         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
  65         __duration_common_type.
  66         (__timepoint_common_type_wrapper): Replace with ...
  67         (__timepoint_common_type): New helper.
  68         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
  69         Use __time_point_common_type.
  70         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
  71         (__common_type_impl): If either argument is transformed by decay,
  72         use the common_type of the decayed types.
  73         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
  74         decayed, use __do_common_type_impl to get the common_type.
  75         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
  76         (__do_member_type_wrapper, __member_type_wrapper)
  77         (__expanded_common_type_wrapper): Remove.
  78         (__common_type_pack, __common_type_fold): New helpers.
  79         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
  80         __member_type_wrapper and __expanded_common_type_wrapper.
  81         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
  82         Test zero-length template argument list.
  83         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
  84         Test single argument cases and argument types that should decay.
  85         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
  86         Adjust expected error.
  87         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
  88         dg-error lineno.
  89         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
  90         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
  91         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
  92
  93         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
  94
  95 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
  96
  97         Make allocator propagation more consistent for
  98         operator+(basic_string) (P1165R1)
  99         * include/bits/basic_string.h
 100         (operator+(basic_string&&, basic_string&&): Changed resulting
 101         allocator to always be the one from the first parameter.
 102         * include/bits/basic_string.tcc
 103         (operator+(const _CharT*, const basic_string&)): Changed
 104         resulting allocator to be SOCCC on the second parameter's allocator.
 105         (operator+(_CharT, const basic_string&)): Likewise.
 106         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
 107         New.
 108         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
 109         New.
 110
 111 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
 112
 113         * include/bits/regex.h: Improve docs.
 114         * include/bits/regex.tcc: Do not document implementation details.
 115
 116         * testsuite/19_diagnostics/error_code/hash.cc: New test.
 117
 118 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
 119
 120         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
 121         Add type printer for container types in std::__debug namespace.
 122         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
 123         (gdb-tests): Use distinct parameters for the type of test and use of
 124         regex.
 125         (gdb-test): Check for regex test even if 'whatis' test.
 126         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
 127         mode.
 128         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
 129         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
 130         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
 131         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
 132         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 133         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
 134         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
 135
 136 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
 137
 138         * include/std/system_error (error_category): Fix comment.
 139
 140         PR libstdc++/90299
 141         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
 142         argument is an empty path.
 143         (absolute(const path&, error_code&)): Use invalid_argument as error
 144         code instead of no_such_file_or_directory.
 145         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
 146         of non-existent paths and empty paths with both overloads of absolute.
 147
 148         * include/std/system_error (error_category, error_code)
 149         (error_condition): Improve docs.
 150         * libsupc++/exception: Add missing @addtogroup Doxygen command.
 151         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
 152         to class documentation. Suppress documentation for implementation
 153         details.
 154         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
 155         Suppress documentation for implementation details.
 156
 157         * include/std/system_error (error_code): Remove friend declaration
 158         for hash<error_code>.
 159         (hash<error_code>::operator()): Use public member functions to access
 160         value and category.
 161         (hash<error_condition>::operator()): Use address of category, not
 162         its object representation.
 163         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
 164         Use public member functions to access value and category.
 165         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
 166
 167 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
 168
 169         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
 170         * include/bits/hashtable_policy.h
 171         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
 172         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
 173         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
 174         smaller than input value rather than always greater. Preserve
 175         _M_next_resize if called with 0 input. Use __builtin_floorl.
 176         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
 177         elements + number of insertions is greater than _M_next_resize. Start
 178         with 11 buckets if not told otherwise. Use __builtin_floorl.
 179         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
 180         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
 181         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
 182         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
 183         told otherwise. Use __builtin_floorl.
 184         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
 185         to also validate _Power2_rehash_policy.
 186         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
 187         Adapt.
 188
 189 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
 190
 191         PR libstdc++/61761
 192         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
 193         std::copysign.
 194
 195         PR libstdc++/52119
 196         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
 197         overflow warning with -Wpedantic -Wsystem-headers.
 198
 199 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
 200
 201         PR libstdc++/90314
 202         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
 203         * include/bits/move.h (swap): Remove extra parentheses.
 204
 205         * include/experimental/bits/lfts_config.h: Improve doc markup.
 206         * include/experimental/optional: Improve docs.
 207         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
 208         (__constexpr_addressof): Remove.
 209         (optional::operator->()): Use std::__addressof().
 210         * include/std/optional (optional::operator->()): Adjust whitespace.
 211         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
 212         that operator-> is still constexpr with overloaded operator&. Change
 213         to compile-only test.
 214         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
 215         compile-only test.
 216
 217         * include/bits/shared_ptr.h: Improve docs.
 218         * include/bits/shared_ptr_atomic.h: Likewise.
 219         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
 220
 221         * include/bits/basic_string.h: Fix iterator/index confusion in
 222         Doxygen comments.
 223         * include/bits/range_access.h: Fix Doxygen warnings.
 224         * include/bits/refwrap.h: Do not document implementation details.
 225         (ref, cref): Group docs with reference_wrapper.
 226         * include/std/fstream: Fix Doxygen markup.
 227         * libsupc++/initializer_list (begin, end): Group docs with
 228         initializer_list.
 229
 230         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
 231
 232         * include/bits/unique_lock.h: Fix/improve doxygen markup.
 233         * include/std/mutex: Likewise.
 234         * include/std/shared_mutex: Likewise.
 235
 236         * include/bits/fs_dir.h: Fix/improve doxygen markup.
 237         * include/bits/fs_fwd.h: Likewise.
 238         * include/bits/fs_ops.h: Likewise.
 239         * include/bits/fs_path.h: Likewise.
 240         * include/std/filesystem: Likewise.
 241
 242         * include/experimental/bits/net.h: Fix/improve doxygen markup.
 243         * include/experimental/buffer: Likewise.
 244         * include/experimental/executor: Likewise.
 245         * include/experimental/internet: Likewise.
 246         * include/experimental/io_context: Likewise.
 247         * include/experimental/net: Likewise.
 248         * include/experimental/netfwd: Likewise.
 249         * include/experimental/socket: Likewise.
 250         * include/experimental/timer: Likewise.
 251
 252         * doc/doxygen/doxygroups.cc: Move description of experimental group
 253         here.
 254         * include/experimental/algorithm: Add to libfund-ts doc group.
 255         * include/experimental/any: Likewise. Do not document implementation
 256         details.
 257         * include/experimental/array: Add to libfund-ts doc group.
 258         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
 259         for Library Fundamentals.
 260         * include/experimental/chrono: Add to libfund-ts doc group.
 261         * include/experimental/deque: Likewise.
 262         * include/experimental/forward_list: Likewise.
 263         * include/experimental/functional: Likewise.
 264         * include/experimental/iterator: Likewise.
 265         * include/experimental/list: Likewise.
 266         * include/experimental/map: Likewise.
 267         * include/experimental/memory: Likewise.
 268         * include/experimental/memory_resource: Likewise. Improve docs.
 269         details.
 270         * include/experimental/numeric: Add to libfund-ts doc group.
 271         * include/experimental/optional: Likewise.
 272         * include/experimental/propagate_const: Likewise.
 273         * include/experimental/random: Likewise.
 274         * include/experimental/ratio: Likewise.
 275         * include/experimental/regex: Likewise.
 276         * include/experimental/set: Likewise.
 277         * include/experimental/source_location: Likewise.
 278         * include/experimental/string: Likewise.
 279         * include/experimental/string_view: Likewise.
 280         * include/experimental/system_error: Likewise.
 281         * include/experimental/tuple: Likewise.
 282         * include/experimental/type_traits: Likewise.
 283         * include/experimental/unordered_map: Likewise.
 284         * include/experimental/unordered_set: Likewise.
 285         * include/experimental/utility: Likewise.
 286         * include/experimental/vector: Likewise.
 287         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
 288         * testsuite/experimental/array/neg.cc: Adjust dg-error.
 289         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
 290         Likewise.
 291         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
 292         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
 293         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
 294         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
 295         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
 296
 297         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
 298         * include/experimental/bits/fs_fwd.h: Improve docs.
 299         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
 300         * include/experimental/bits/fs_path.h: Likewise.
 301         (path, filesystem_error, u8path): Improve docs.
 302         * include/experimental/filesystem: Link to docs for TS.
 303
 304         * config/allocator/new_allocator_base.h (__allocator_base): Add
 305         workaround for Doxygen bug #6945.
 306         * include/std/memory: Improve docs. Define group for pointer safety.
 307         * include/std/scoped_allocator: Improve docs. Use "undocumented"
 308         conditional to suppress documentation for implementation details.
 309
 310         * include/bits/specfun.h: Improve docs.
 311         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
 312         and namespaces.
 313
 314         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
 315         (std::experimental): Add docs.
 316         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
 317         namespace to nothing when generating docs.
 318         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
 319         * include/std/chrono (std::chrono): Likewise.
 320         * include/std/functional (std::placeholders): Likewise.
 321         * include/std/thread (std::this_thread): Likewise.
 322
 323         * include/parallel/settings.h: Fix Doxygen markup.
 324
 325         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
 326         anything unless PB_DS_CLASS_C_DEC is defined.
 327         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
 328         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
 329         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
 330         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
 331         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
 332         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
 333         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
 334         Likewise.
 335         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
 336         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
 337         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
 338         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
 339         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
 340         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
 341         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
 342         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
 343         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
 344         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
 345         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
 346         Likewise.
 347         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
 348         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
 349         Likewise.
 350         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
 351         Likewise.
 352
 353         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
 354         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
 355         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
 356         Doxygen expands.
 357
 358 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 359
 360         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
 361         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
 362         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
 363         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
 364         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
 365         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
 366         Likewise.
 367         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
 368         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
 369         Likewise.
 370
 371 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
 372
 373         PR libstdc++/61761
 374         * include/std/complex (__complex_proj): Return parameter unchanged.
 375         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
 376         floating-point types to take std::complex arguments.
 377         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
 378         floating-point types.
 379         * testsuite/26_numerics/complex/proj.cc: New test.
 380
 381 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
 382
 383         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
 384         to _Lock_policyE[012].
 385         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
 386
 387 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
 388
 389         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
 390         macros accidentally left in.
 391         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
 392         unnecessary -lstdc++fs option. Fix test for mingw.
 393         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
 394         Fix test for mingw.
 395
 396 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
 397
 398         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
 399
 400 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
 401
 402         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
 403
 404         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
 405         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
 406
 407         PR libstdc++/71312
 408         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
 409
 410         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
 411         attribute.
 412
 413         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
 414         class template and partial specialization.
 415
 416         PR libstdc++/87982
 417         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
 418         an integral type.
 419         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
 420         functions to convert a value to an integral type.
 421         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
 422         (fill_n): Convert _Size parameter to an integral type.
 423         * testsuite/25_algorithms/fill_n/87982.cc: New test.
 424         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
 425         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
 426         * testsuite/25_algorithms/generate_n/87982.cc: New test.
 427         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
 428         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
 429
 430 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
 431
 432         Adding noexcept-specification on tuple constructors (LWG 2899)
 433         * libstdc++-v3/include/std/tuple:
 434         (tuple()): Add noexcept-specification.
 435         (tuple(const _Elements&...)): Likewise
 436         (tuple(_UElements&&...)): Likewise
 437         (tuple(const tuple<_UElements...>&)): Likewise
 438         (tuple(tuple<_UElements...>&&)): Likewise
 439         (tuple(const _T1&, const _T2&)): Likewise
 440         (tuple(_U1&&, _U2&&)): Likewise
 441         (tuple(const tuple<_U1, _U2>&): Likewise
 442         (tuple(tuple<_U1, _U2>&&): Likewise
 443         (tuple(const pair<_U1, _U2>&): Likewise
 444         (tuple(pair<_U1, _U2>&&): Likewise
 445         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
 446
 447 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
 448
 449         PR libstdc++/87106
 450         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
 451         arguments with __restrict.
 452
 453 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
 454
 455         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
 456
 457 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
 458
 459         * include/experimental/bits/fs_path.h
 460         (path::_S_convert_loc<_InputIterator>): Create const std::string to
 461         avoid redundant call to _S_convert_loc with non-const pointers.
 462
 463         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
 464         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
 465         * testsuite/21_strings/basic_string/hash/hash.cc
 466         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
 467         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
 468         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
 469
 470         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
 471         wstring::_M_replace_dispatch with more specific patterns.
 472         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
 473         Create const std::string to avoid redundant call to _S_convert_loc
 474         with non-const pointers.
 475         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
 476         avoid unnecessary basic_string::assign instantiations.
 477
 478         * include/std/memory (__uses_alloc_args): Add string-literal to
 479         static_assert, to match the one in __uses_alloc.
 480         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
 481         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
 482         for recursive uses-allocator construction of nested pairs.
 483         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
 484         comment.
 485
 486 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
 487
 488         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
 489         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
 490         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
 491         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
 492
 493         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
 494         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
 495         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
 496         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
 497         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 498         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
 499         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
 500
 501 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
 502
 503         PR libstdc++/90239
 504         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
 505         * include/std/scoped_allocator [__cplusplus > 201703L]
 506         (scoped_allocator_adaptor::construct): Define in terms of
 507         uses_allocator_construction_args, as per P0591R4.
 508         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
 509         * testsuite/util/testsuite_allocator.h: Remove name of unused
 510         parameter.
 511
 512 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
 513
 514         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
 515         * doc/html/*: Regenerate.
 516
 517         * include/bits/fs_path.h (operator<, operator<=, operator>)
 518         (operator>=, operator==, operator!=): Make hidden friends, as per
 519         LWG 3065.
 520         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
 521         string type in test.
 522         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
 523
 524         * include/std/any (any::any(ValueType&&)): Use __and_v.
 525         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
 526         Likewise.
 527
 528         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
 529         as per P0777R1.
 530         * include/std/type_traits (__result_of_memfun): Use remove_reference
 531         instead of __remove_cvref_t and remove redundant is_same check.
 532         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
 533
 534         * include/experimental/string_view (basic_string_view::pointer)
 535         (basic_string_view::reference): Fix to refer to non-const value_type.
 536         * include/bits/basic_string.h (basic_string): Use __sv_check and
 537         __sv_limit instead of basic_string_view::_M_check and
 538         basic_string_view::_M_limit.
 539         * include/std/string_view (__sv_check, __sv_limit): New
 540         helper functions to replace basic_string_view::_M_check and
 541         basic_string_view::_M_limit.
 542         (basic_string_view): Add static assertions to enforce ill-formed
 543         requirement for traits_type::char_type from P1148R0, and to enforce
 544         required properties of char-like types.
 545         (basic_string_view::pointer, basic_string_view::reference): Fix to
 546         refer to non-const value_type.
 547         (basic_string_view::operator[], basic_string_view::at)
 548         (basic_string_view::front, basic_string_view::back)
 549         (basic_string_view::data): Use const_reference and const_pointer
 550         typedefs for return types.
 551         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
 552         (hash<wstring_view>): Fix argument_type typedef.
 553         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
 554         char/1.cc: Fix expected return type of basic_string_view::data().
 555         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
 556         wchar_t/1.cc: Likewise.
 557         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
 558         char/1.cc: Likewise.
 559         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
 560         wchar_t/1.cc: Likewise.
 561         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
 562         New test.
 563         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
 564         Check reference and pointer typedefs.
 565         * testsuite/experimental/string_view/requirements/typedefs.cc:
 566         Likewise.
 567         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
 568         Fix expected return type of basic_string_view::data().
 569         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
 570         1.cc: Likewise.
 571         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
 572         Likewise.
 573         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
 574         1.cc: Likewise.
 575
 576         PR libstdc++/90220
 577         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
 578         Avoid a runtime check for types that can never be stored in std::any.
 579         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
 580         array types.
 581
 582         PR libstdc++/90220 (partial)
 583         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
 584         not attempt ill-formed static_cast to pointers to non-object types.
 585         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
 586         function types.
 587
 588         * testsuite/20_util/variant/run.cc: Catch exception by reference to
 589         prevent -Wcatch-value warning.
 590
 591         * include/std/variant (__variant_construct): Use template parameter
 592         type instead of equivalent decltype-specifier.
 593         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
 594         Replace forward with move.
 595         (_Move_ctor_base<false, Types...>::_M_destructive_move)
 596         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
 597         (_Move_ctor_base<true, Types...>::_M_destructive_move)
 598         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
 599         index after construction succeeds.
 600         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
 601         if-constexpr checks that are always true. Use __remove_cvref_t instead
 602         of remove_reference so that is_nothrow_move_constructible check
 603         doesn't use a const rvalue parameter. In the potentially-throwing case
 604         construct a temporary and move assign it, as per LWG 2904.
 605         (_Move_assign_base<false, Types...>::operator=): Remove redundant
 606         if-constexpr checks that are always true. Use emplace as per LWG 2904.
 607         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
 608         construct a temporary and move assign from it, as per LWG 2904.
 609         * testsuite/20_util/variant/exception_safety.cc: Check that
 610         assignment operators have strong exception safety guarantee.
 611
 612 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
 613
 614         Document PSTL linker flags
 615
 616         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
 617
 618 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
 619
 620         * include/std/variant (__detail::__variant::_Traits): Make
 621         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
 622         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
 623         P0602R4.
 624         (__detail::__variant::_Copy_assign_alias): Only depend on
 625         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
 626         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
 627         move assignment operators.
 628
 629         PR libstdc++/90165
 630         * include/std/variant (variant::__not_self): New helper for the
 631         is_same_v<remove_cvref_t<T>, variant>==false constraints.
 632         (variant::__to_type_impl): Remove.
 633         (variant::__to_type): Add default argument to check pack size, instead
 634         of using __to_type_impl.
 635         (variant::__accepted_type): Add default argument using __not_self.
 636         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
 637         for variant(T&&) constructor constraint.
 638         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
 639         Extract __accepted_type into a named template parameter for reuse in
 640         other constraints and in the exception specification.
 641         (variant::variant(in_place_type_t<T>, Args&&...))
 642         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
 643         (variant::variant(in_place_index_t<T>, Args&&...))
 644         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
 645         (variant::operator=T&&)): Remove redundant && from trait arguments.
 646         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
 647         isn't used for in_place_type or in_place_index arguments.
 648
 649         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
 650         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
 651         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
 652
 653 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
 654             Bernd Edlinger  <bernd.edlinger@hotmail.de>
 655             Jakub Jelinek  <jakub@redhat.com>
 656
 657         PR target/89093
 658         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
 659         general-regs-only target attribute for ARM.
 660
 661 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
 662
 663         PR libstdc++/87431
 664         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
 665         specialization also depend on is_nothrow_move_constructible.
 666         * include/std/variant (__detail::__variant::__never_valueless()):
 667         Only true if the variant would have a move assignment operator.
 668         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
 669         Check __never_valueless<T...>().
 670         (variant::emplace): Only perform non-throwing move assignments
 671         for never-valueless alternatives if the variant has a move assignment
 672         operator.
 673         * testsuite/20_util/variant/compile.cc: Check that never-valueless
 674         types can be emplaced into non-assignable variants.
 675         * testsuite/20_util/variant/run.cc: Check that never-valueless types
 676         don't get copied when emplaced into non-assignable variants.
 677
 678         * include/std/variant (__detail::__variant::__ref_cast): Remove
 679         unused function.
 680         (__detail::__variant::_Uninitialized::_M_get)
 681         (__detail::__variant::__get)
 682         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
 683
 684 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
 685
 686         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
 687         to Darwin10.
 688         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
 689         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
 690         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
 691         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
 692
 693 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
 694
 695         Delegate PSTL configuration to pstl/pstl_config.h
 696
 697         * include/bits/c++config: Remove explicit PSTL configuration
 698         macros and use definitions from <pstl/pstl_config.h>.
 699
 700 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
 701
 702         Cleanup algorithm implementations
 703         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
 704         execution policy.
 705         (mismatch): Forward execution policy.
 706         (equal): Qualify call to std::equal().
 707         (partial_sort): Forward execution policy.
 708         (inplace_merge): Forward execution policy.
 709
 710 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
 711
 712         Improve implementation of parallel equal()
 713         * include/pstl/algorithm_impl.h
 714         (__internal::__brick_equal): use "4 iterator" version of
 715         std::equal().
 716         (__internal::__brick_equal): use simd for random access
 717         iterators on unsequenced execution policies.
 718         (__internal::__pattern_equal): add "4 iterator" version
 719         (__internal::__pattern_equal): dispatch to simd __brick_equal
 720         for vector-only execution policies.
 721         (__internal::__pattern_equal): dispatch to __parallel_or for
 722         parallel execution policies.
 723         * include/pstl/glue_algorithm_impl.h
 724         (std::equal): dispatch to "4 iterator" version of
 725         __internal::__pattern_equal().
 726
 727 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
 728
 729         PR libstdc++/90105
 730         * include/bits/forward_list.h (operator==): Do not use operator!= to
 731         compare elements.
 732         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
 733         earlier in the list, so that sort is stable.
 734         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
 735         * testsuite/23_containers/forward_list/comparable.cc: Test with
 736         types that meet the minimum EqualityComparable and LessThanComparable
 737         requirements. Remove irrelevant comment.
 738
 739         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
 740         Do not depend on whether all alternative types are move constructible.
 741         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
 742         from the operand when deciding whether to perform the assignment.
 743         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
 744         with deleted move constructor and deleted move assignment operator.
 745         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
 746         behaviour of variants with DeletedMoves as an alternative.
 747         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
 748         (move_ctor, move_assign): Check that moving a variant with a
 749         DeletedMoves alternative falls back to copying instead of moving.
 750
 751         * testsuite/20_util/variant/compile.cc: Remove empty string literals
 752         from static_assert declarations.
 753
 754         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
 755         actually match its name.
 756         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
 757         (test_swap()): Fix result for MoveCtorOnly and check
 758         MoveCtorAndSwapOnly.
 759
 760         * include/std/optional (optional::value_or(U&&) &&): Add missing
 761         constexpr specifier.
 762         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
 763         for disengaged optionals and rvalue optionals.
 764         * testsuite/20_util/optional/observers/4.cc: Likewise.
 765
 766 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
 767
 768         * include/pstl/algorithm_impl.h: Uglify identfiers.
 769         * include/pstl/numeric_impl.h:  Uglify identfiers.
 770         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
 771
 772 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
 773
 774         * include/bits/c++config:
 775         Add definition for __PSTL_ASSERT.
 776         Add definition for __PSTL_ASSERT_MSG.
 777         * include/pstl/algorithm_impl.h: Replace use of assert().
 778         * include/pstl/numeric_impl.h: Replace use of assert().
 779         * include/pstl/parallel_backend_tbb.h:
 780         Replace use of assert().
 781         Replace use of __TBB_ASSERT().
 782         * include/pstl/parallel_backend_utils.h: Replace use of assert().
 783
 784 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
 785
 786         PR libstdc++/90046
 787         * src/c++17/memory_resource.cc
 788         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
 789         needed to allow placing a _Chunk at the end of the buffer.
 790         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
 791
 792 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
 793
 794         * doc/xml/faq.xml: Add information about emergency EH pool.
 795         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
 796         Move outdated information on mt_allocator to a separate section.
 797         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
 798         doesn't affect the default allocator.
 799
 800         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
 801         typo.
 802
 803         PR libstdc++/89851
 804         * testsuite/20_util/variant/89851.cc: New test.
 805
 806 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
 807
 808         * include/std/variant: Adjust whitespace. Add comments.
 809         (_Multi_array): Leave primary template undefined.
 810         (_Multi_array<_Tp>): Define partial specialization for base case of
 811         recursion.
 812         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
 813         which is always a reference.
 814         (__gen_vtable::_S_apply()): Remove function, inline body into
 815         default member initializer.
 816         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
 817
 818         * include/std/variant (__variant_idx_cookie): Add member type.
 819         (__visitor_result_type): Remove.
 820         (__do_visit): Use invoke_result instead of __visitor_result_type.
 821         * testsuite/20_util/variant/visit.cc: New test.
 822
 823         PR libstdc++/90008
 824         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
 825         unused capture.
 826         * testsuite/20_util/variant/90008.cc: New test.
 827
 828 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
 829
 830         * include/pstl/algorithm_impl.h: Add namespace qualification.
 831         * include/pstl/execution_defs.h: Add namespace qualification.
 832         * include/pstl/execution_impl.h: Add namespace qualification.
 833         * include/pstl/numeric_impl.h: Add namespace qualification.
 834         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
 835         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
 836         * include/pstl/parallel_backend_utils.h: Include <cassert>.
 837
 838 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
 839
 840         Fix visit<R> for variant.
 841         * include/std/variant (__do_visit): Add a template parameter
 842         for enforcing same return types for visit.
 843         (__gen_vtable_impl): Likewise.
 844         (_S_apply_single_alt): Adjust.
 845         (__visit_invoke_impl): New. Handle casting to void.
 846         (__do_visit_invoke): New. Enforces same return types.
 847         (__do_visit_invoke_r): New. Converts return types.
 848         (__visit_invoke): Adjust.
 849         (__gen_vtable):  Add a template parameter for enforcing
 850         same return types for visit.
 851         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
 852         different return types.
 853         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
 854         visitors with different return types don't accidentally
 855         compile with regular visitation.
 856
 857 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
 858
 859         * testsuite/27_io/filesystem/iterators/caching.cc: Add
 860         dg-require-filesystem-ts.
 861
 862 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
 863
 864         * doc/xml/manual/status_cxx2020.xml: Update status.
 865         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
 866         * testsuite/20_util/variant/visit_r.cc: New test.
 867
 868         * include/bits/fs_dir.h (directory_iterator::operator*)
 869         (directory_iterator::operator->): Add noexcept.
 870         (operator==, operator!=): Replace namespace-scope equality operators
 871         for directory iterators with hidden friends.
 872
 873         PR libstdc++/89986
 874         * config/abi/pre/gnu.ver: Add missing exports.
 875         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
 876         increment member.
 877
 878         * config/abi/pre/gnu.ver: Export new symbols.
 879         * include/bits/fs_dir.h (recursive_directory_iterator::options())
 880         (recursive_directory_iterator::recursion_pending())
 881         (recursive_directory_iterator::disable_recursion_pending()): Remove
 882         inline definitions. Make noexcept.
 883         (recursive_directory_iterator::depth())
 884         (recursive_directory_iterator::operator*())
 885         (recursive_directory_iterator::operator->()): Make noexcept.
 886         (recursive_directory_iterator::_M_options)
 887         (recursive_directory_iterator::_M_pending): Remove data members.
 888         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
 889         (recursive_directory_iterator::recursive_directory_iterator): Remove
 890         ctor-initializer. Use new constructor for _Dir_stack.
 891         (recursive_directory_iterator::options())
 892         (recursive_directory_iterator::recursion_pending())
 893         (recursive_directory_iterator::disable_recursion_pending()): Add
 894         non-inline definitions.
 895         (recursive_directory_iterator::depth()): Make noexcept.
 896         (recursive_directory_iterator::increment(error_code&))
 897         (recursive_directory_iterator::pop(error_code&)): Adjust to new
 898         location of options and recursion_pending members.
 899         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
 900         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
 901         user-declared move constructor and assignment operator, to make the
 902         type move-only.
 903
 904         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
 905         d_type == DT_UNKNOWN immediately.
 906         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
 907         handling here.
 908         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
 909
 910         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
 911         assignment.
 912         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
 913         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
 914         assignment.
 915
 916         PR libstdc++/87431 (again)
 917         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
 918         Define partial specialization for basic_string.
 919         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
 920         shared_ptr and weak_ptr.
 921         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
 922         function.
 923         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
 924         vector.
 925         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
 926         unique_ptr.
 927         * include/debug/vector (_Never_valueless_alt): Likewise for debug
 928         vector.
 929         * include/std/any (_Never_valueless_alt): Define explicit
 930         specialization for any.
 931         * include/std/variant (_Never_valueless_alt): Define primary template.
 932         (__never_valueless): Use _Never_valueless_alt instead of
 933         is_trivially_copyable.
 934         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
 935         initializations to avoid try-catch overhead. Add special case for
 936         scalars produced by potentially-throwing conversions. Use
 937         _Never_valueless_alt instead of is_trivially_copyable for the
 938         remaining strong exception-safety cases.
 939         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
 940         * testsuite/20_util/variant/87431.cc: Run both test functions.
 941         * testsuite/20_util/variant/exception_safety.cc: New test.
 942         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
 943         so the variant becomes valueless.
 944
 945 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
 946
 947         PR libstdc++/85184
 948         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
 949         Remove assertions.
 950         (variant::emplace<_Tp>): Return result of emplace<N> directly.
 951
 952         * include/std/string (__hash_string_base): New class template defining
 953         operator() for hashing strings.
 954         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
 955         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
 956         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
 957         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
 958
 959 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
 960
 961         Use single-visitation in variant assignment and swap and relops.
 962         Also use indices instead of types when checking whether
 963         variants hold the same thing.
 964         * include/std/variant (__do_visit): Add a template parameter
 965         for index visitation, invoke with indices if index visitation
 966         is used.
 967         (__variant_idx_cookie): New.
 968         (__visit_with_index): Likewise.
 969         (_Copy_assign_base::operator=): Do single-visitation with
 970         an index visitor.
 971         (_Move_assign_base::operator=): Likewise.
 972         (_Extra_visit_slot_needed): Adjust.
 973         (__visit_invoke): Call with indices if it's an index visitor.
 974         (relops): Do single-visitation with an index visitor.
 975         (swap): Likewise.
 976         (__visitor_result_type): New.
 977
 978 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
 979
 980         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
 981
 982 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
 983
 984         Don't revisit a variant we are already visiting.
 985         * include/std/variant (__variant_construct_single): New.
 986         (__variant_construct): Use it.
 987         (_M_destructive_move): Likewise.
 988         (_M_destructive_copy): Likewise.
 989         (_Copy_assign_base::operator=): Adjust.
 990         (_Move_assign_base::operator=): Likewise.
 991         (swap): Likewise.
 992
 993 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
 994
 995         PR libstdc++/85965
 996         * include/bits/hashtable.h (_Hashtable): Move static assertions to
 997         destructor so they are not evaluated until the _Key type is complete.
 998         * include/bits/stl_tree.h (_Rb_tree): Likewise.
 999         * testsuite/23_containers/set/85965.cc: New test.
1000         * testsuite/23_containers/unordered_set/85965.cc: New test.
1001         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
1002         with regexp matching the corresponding _Rb_tree specialization.
1003         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
1004         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
1005         * testsuite/23_containers/set/48101_neg.cc: Likewise.
1006         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
1007         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
1008         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
1009         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
1010
1011 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
1012
1013         PR libstdc++/89825
1014         Fix based on a suggestion by Antony Polukhin.
1015         * include/std/variant (__never_valueless): New.
1016         (_M_valid): Use it.
1017         (_Extra_visit_slot_needed): New.
1018         (_Multi_array): Use it.
1019         (_S_apply_all_alts): Likewise.
1020
1021 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
1022
1023         PR libstdc++/89824
1024         Fix based on a suggestion by Antony Polukhin.
1025         * include/std/variant (__gen_vtable): Don't reserve an
1026         additional table slot, _Multi_array already does that.
1027
1028 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
1029
1030         PR libstdc++/89816
1031         Fix based on a suggestion by Antony Polukhin.
1032         * include/std/variant (__variant_construct): Capture a pointer
1033         to the storage and visit just one variant.
1034
1035 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
1036
1037         * doc/xml/manual/backwards_compatibility.xml: Remove link to
1038         Doxygen-generated pages with unstable URL.
1039         * doc/xml/manual/concurrency_extensions.xml: Likewise.
1040         * doc/xml/manual/extensions.xml: Likewise.
1041         * doc/xml/manual/parallel_mode.xml: Likewise.
1042         * doc/xml/manual/support.xml: Likewise.
1043
1044         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
1045         avoid -Wconversion warnings.
1046
1047 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
1048
1049         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
1050         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
1051         (allstamped): Add stamp-pstl.
1052         (install-headers): Add ptsl_builddir.
1053         * include/Makefile.in: Regenerate.
1054         * include/bits/c++config: Add pstl configuration.
1055         * include/pstl/LICENSE.txt: New file.
1056         * include/pstl/algorithm_fwd.h: New file.
1057         * include/pstl/algorithm_impl.h: New file.
1058         * include/pstl/execution_defs.h: New file.
1059         * include/pstl/execution_impl.h: New file.
1060         * include/pstl/glue_algorithm_defs.h: New file.
1061         * include/pstl/glue_algorithm_impl.h: New file.
1062         * include/pstl/glue_execution_defs.h: New file.
1063         * include/pstl/glue_memory_defs.h: New file.
1064         * include/pstl/glue_memory_impl.h: New file.
1065         * include/pstl/glue_numeric_defs.h: New file.
1066         * include/pstl/glue_numeric_impl.h: New file.
1067         * include/pstl/memory_impl.h: New file.
1068         * include/pstl/numeric_fwd.h: New file.
1069         * include/pstl/numeric_impl.h: New file.
1070         * include/pstl/parallel_backend.h: New file.
1071         * include/pstl/parallel_backend_tbb.h: New file.
1072         * include/pstl/parallel_backend_utils.h: New file.
1073         * include/pstl/parallel_impl.h: New file.
1074         * include/pstl/pstl_config.h: New file.
1075         * include/pstl/unseq_backend_simd.h: New file.
1076         * include/pstl/utils.h: New file.
1077         * include/std/algorithm: Include parallel algorithm implementations.
1078         * include/std/execution: New file.
1079         * include/std/memory: Include parallel algorithm implementations.
1080         * include/std/numeric: Include parallel algorithm implementations.
1081         * include/std/version: Add parallel algorithms feature test macro.
1082         * testsuite/util/pstl/pstl_test_config.h: New file.
1083         * testsuite/util/pstl/test_utils.h: New file.
1084         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
1085         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
1086         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
1087         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
1088         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
1089         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
1090         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
1091         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
1092         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
1093         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
1094         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
1095         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
1096         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
1097         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
1098         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
1099         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
1100         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
1101         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
1102         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
1103         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
1104         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
1105         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
1106         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
1107         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
1108         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
1109         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
1110         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
1111         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
1112         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
1113         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
1114         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
1115         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
1116         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
1117         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
1118         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
1119         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
1120         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
1121         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
1122         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
1123         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
1124         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
1125         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
1126         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
1127         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
1128         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
1129         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
1130         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
1131         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
1132         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
1133         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
1134         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
1135         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
1136         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
1137         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
1138         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
1139         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
1140         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
1141         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
1142         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
1143         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
1144         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
1145         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
1146         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
1147         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
1148         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
1149         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
1150         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
1151         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
1152         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
1153         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
1154         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
1155         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
1156         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
1157         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
1158         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
1159         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
1160         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
1161         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
1162         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
1163         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
1164         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
1165         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
1166         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
1167         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
1168         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
1169         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
1170         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
1171         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
1172         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
1173         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
1174         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
1175         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
1176         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
1177         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
1178         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
1179         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
1180         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
1181         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
1182         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
1183         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
1184         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
1185         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
1186         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
1187         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
1188         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
1189         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
1190
1191 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
1192
1193         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
1194         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
1195         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
1196         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
1197         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
1198         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
1199         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
1200         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
1201         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
1202         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
1203         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
1204         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
1205         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
1206         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
1207         when the special functions IS is enabled, not for C++17.
1208         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
1209         Replace with ...
1210         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
1211         without checks for special functions in C++17.
1212         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
1213         New test.
1214
1215         PR libstdc++/88066
1216         * include/backward/hash_map: Use <> for includes not "".
1217         * include/backward/hash_set: Likewise.
1218         * include/backward/strstream: Likewise.
1219         * include/tr1/bessel_function.tcc: Likewise.
1220         * include/tr1/exp_integral.tcc: Likewise.
1221         * include/tr1/legendre_function.tcc: Likewise.
1222         * include/tr1/modified_bessel_func.tcc: Likewise.
1223         * include/tr1/riemann_zeta.tcc: Likewise.
1224
1225 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
1226
1227         * doc/xml/manual/allocator.xml: Link to table documenting evolution
1228         of extension allocators.
1229         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
1230         Document new headers in 7.2, 8.1 and 9.1 releases.
1231         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
1232         * doc/html/*: Regenerate.
1233
1234 2019-03-12  John David Anglin  <dave.anglin@bell.net>
1235
1236         PR libstdc++/89461
1237         * testsuite/lib/libstdc++.exp: Locate libatomic.
1238         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
1239         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
1240         libatomic options.
1241         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
1242         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
1243         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
1244         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
1245
1246 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
1247
1248         PR libstdc++/89460
1249         * configure.ac: Check for sockatmark.
1250         * crossconfig.m4: Check for sockatmark.
1251         * config.h.in: Regenerate.
1252         * configure: Regenerate.
1253         * include/experimental/internet (address_v4::_S_hton): Rename
1254         overloaded functions to _S_hton_16 and _S_ntoh_16.
1255         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
1256         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
1257         * include/experimental/socket (basic_socket::at_mark): Check
1258         _GLIBCXX_HAVE_SOCKATMARK.
1259
1260         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
1261         const variables instead of macros.
1262
1263         PR libstdc++/89629
1264         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
1265         Use correct type for len_aligned.
1266         * testsuite/20_util/hash/89629.cc: New test.
1267
1268 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
1269
1270         PR libstdc++/89641
1271         * include/std/atomic (atomic<T>::store, atomic<T>::load,
1272         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
1273         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
1274         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
1275         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
1276         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
1277         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
1278         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
1279         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
1280         memory_order_seq_cst to int.
1281
1282 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
1283
1284         * doc/xml/manual/using.xml: Use link element instead of xref.
1285         * doc/html/*: Regenerate.
1286
1287         * include/bits/fs_path.h (path::format): Add fixed underlying type.
1288
1289 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
1290
1291         PR libstdc++/89477
1292         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
1293         parameters in deduction guides.
1294         * include/debug/multimap.h (multimap): Likewise.
1295         * include/debug/set.h (multimap): Likewise.
1296         * include/debug/multiset.h (multimap): Likewise.
1297         * include/debug/unordered_map (unordered_map): Likewise.
1298         (unordered_multimap): Likewise.
1299         * include/debug/unordered_set (unordered_set): Likewise.
1300         (unordered_multiset): Likewise.
1301
1302         PR libstdc++/89608
1303         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
1304         Invalidate all iterators in case of rehash.
1305         (unordered_multimap<>::_M_check_rehashed): Likewise.
1306         * include/debug/unordered_set
1307         (unordered_set<>::_M_check_rehashed): Likewise.
1308         (unordered_multiset<>::_M_check_rehashed): Likewise.
1309         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
1310
1311 2019-03-07  Andreas Schwab  <schwab@suse.de>
1312
1313         * config/abi/post/riscv64-linux-gnu: New directory.
1314         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
1315
1316 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
1317
1318         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
1319         compile test to run. Fix typo.
1320
1321         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
1322         * doc/html/*: Regenerate.
1323
1324         P0356R5 Simplified partial function application
1325         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
1326         helpers for bind_front.
1327         (bind_front, __cpp_lib_bind_front): Define.
1328         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
1329
1330 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
1331
1332         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
1333         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
1334         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
1335         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
1336
1337 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
1338
1339         PR libstdc++/86655 - std::assoc_legendre should not constrain
1340         the value of m (or x).
1341         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
1342         __sph_legendre): If degree > order Don't throw, return 0.
1343         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
1344         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
1345         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
1346         * testsuite/tr1/5_numerical_facilities/special_functions/
1347         02_assoc_legendre/pr86655.cc: New test.
1348         * testsuite/tr1/5_numerical_facilities/special_functions/
1349         22_sph_legendre/pr86655.cc: New test.
1350
1351 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
1352
1353         Rewrite variant.
1354         Also PR libstdc++/85517
1355         * include/std/variant (__do_visit): New.
1356         (__variant_cast): Likewise.
1357         (__variant_cookie): Likewise.
1358         (__erased_*): Remove.
1359         (_Variant_storage::_S_vtable): Likewise.
1360         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
1361         (_Variant_storage::__M_reset): Adjust.
1362         (__variant_construct): New.
1363         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
1364         __variant_construct.
1365         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
1366         (_Move_ctor_base::__M_destructive_copy): New.
1367         (_Move_ctor_base::__M_destructive_move): Adjust to use
1368         __variant_construct.
1369         (_Copy_assign_base::operator=): Adjust to use __do_visit.
1370         (_Copy_assign_alias): Adjust to check both copy assignment
1371         and copy construction for triviality.
1372         (_Move_assign_base::operator=): Adjust to use __do_visit.
1373         (_Multi_array): Add support for visitors that accept and return
1374         a __variant_cookie.
1375         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
1376         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
1377         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
1378         a __variant_cookie temporary for a variant that is valueless and..
1379         (__gen_vtable_impl::__visit_invoke): ..adjust here.
1380         (__gen_vtable::_Array_type): Conditionally make space for
1381         the __variant_cookie visitor case.
1382         (__variant_construct_by_index): New.
1383         (get_if): Adjust to use std::addressof.
1384         (relops): Adjust to use __do_visit.
1385         (variant): Add __variant_cast and __variant_construct_by_index
1386         as friends.
1387         (variant::emplace): Use _M_reset() and __variant_construct_by_index
1388         instead of self-destruction.
1389         (variant::swap): Adjust to use __do_visit.
1390         (visit): Reimplement in terms of __do_visit.
1391         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
1392         * testsuite/20_util/variant/compile.cc: Adjust.
1393         * testsuite/20_util/variant/run.cc: Likewise.
1394
1395 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
1396
1397         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
1398         constant.
1399         * testsuite/experimental/feat-char8_t.cc: Likewise.
1400
1401          * include/std/type_traits [C++20] (is_bounded_array)
1402          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
1403          Define.
1404          * testsuite/20_util/is_bounded_array/requirements/
1405          explicit_instantiation.cc: New test.
1406          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
1407          test.
1408          * testsuite/20_util/is_bounded_array/value.cc: New test.
1409          * testsuite/20_util/is_unbounded_array/requirements/
1410          explicit_instantiation.cc: New test.
1411          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
1412          * test.
1413          * testsuite/20_util/is_unbounded_array/value.cc: New test.
1414
1415         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
1416         Add constexpr.
1417         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
1418
1419 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
1420
1421         * include/c_compatibility/math.h [C++20] (lerp): Add using
1422         declaration.
1423         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
1424         (__lerp): Define function template to implement lerp.
1425         (lerp(float, float, float), lerp(double, double, double))
1426         (lerp(long double, long double, long double)): Define for C++20.
1427         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
1428         (midpoint(T, T), midpoint(T*, T*)): Define.
1429         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
1430         * testsuite/26_numerics/lerp.cc: New test.
1431         * testsuite/26_numerics/midpoint/floating.cc: New test.
1432         * testsuite/26_numerics/midpoint/integral.cc: New test.
1433         * testsuite/26_numerics/midpoint/pointer.cc: New test.
1434
1435 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
1436
1437         PR libstdc++/88996 Implement P0439R0
1438         Make std::memory_order a scoped enumeration.
1439         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
1440         add variables for the old enumerators.  Adjust calls.
1441         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
1442         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
1443
1444 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
1445
1446         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
1447         directive.
1448
1449         * include/std/memory_resource (polymorphic_allocator): Add default
1450         template argument for C++20.
1451         (polymorphic_allocator::allocate_bytes)
1452         (polymorphic_allocator::deallocate_bytes)
1453         (polymorphic_allocator::allocate_object)
1454         (polymorphic_allocator::deallocate_object)
1455         (polymorphic_allocator::new_object)
1456         (polymorphic_allocator::delete_object): New member functions for
1457         C++20.
1458         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
1459         test.
1460
1461 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
1462
1463         PR libstdc++/89562
1464         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
1465         mode for mingw.
1466
1467 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
1468
1469         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
1470         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
1471
1472         * include/std/memory (uses_allocator_construction_args): New set of
1473         overloaded functions.
1474         (make_obj_using_allocator, uninitialized_construct_using_allocator):
1475         New functions.
1476         * include/std/memory_resource (polymorphic_allocator::construct)
1477         [__cplusplus > 201703l]: Replace all overloads with a single function
1478         using uses_allocator_construction_args.
1479         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
1480         test.
1481         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
1482
1483 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
1484
1485         PR libstdc++/89466
1486         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
1487         stylesheet directories before check for xsltproc. Try to use
1488         xmlcatalog to find local stylesheet directory before trying hardcoded
1489         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
1490         check to look for the same stylesheet as doc/Makefile.am uses. Don't
1491         use xsltproc if xmlcatalog fails to find a local stylesheet.
1492         * configure.ac: Check for xmlcatalog.
1493         * Makefile.in: Regenerate.
1494         * configure: Likewise.
1495         * doc/Makefile.in: Likewise.
1496         * include/Makefile.in: Likewise.
1497         * libsupc++/Makefile.in: Likewise.
1498         * po/Makefile.in: Likewise.
1499         * python/Makefile.in: Likewise.
1500         * src/Makefile.in: Likewise.
1501         * src/c++11/Makefile.in: Likewise.
1502         * src/c++17/Makefile.in: Likewise.
1503         * src/c++98/Makefile.in: Likewise.
1504         * src/filesystem/Makefile.in: Likewise.
1505         * testsuite/Makefile.in: Likewise.
1506
1507 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
1508
1509         PR libstdc++/89477
1510         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
1511         container deduction guides.
1512         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
1513         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
1514         parameters in deduction guides.
1515         * include/bits/stl_multimap.h (multimap): Likewise.
1516         * include/bits/stl_multiset.h (multiset): Likewise.
1517         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
1518         * include/bits/stl_set.h (set): Likewise.
1519         * include/bits/stl_stack.h (stack): Likewise.
1520         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
1521         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
1522         constrain parameters in deduction guides.
1523         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
1524         Likewise.
1525         * testsuite/23_containers/map/cons/deduction.cc: Test additional
1526         deduction cases.
1527         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
1528         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
1529         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
1530         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
1531         Likewise.
1532         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
1533         Likewise.
1534         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
1535
1536         PR libstdc++/89416
1537         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
1538         to class template and partial specialization using void_t.
1539         (__is_copy_insertable, __is_move_insertable): Adjust base class.
1540
1541 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
1542
1543         PR libstdc++/89416
1544         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
1545         copy and move members public.
1546
1547 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
1548
1549         * include/std/type_traits (__underlying_type_impl): New helper to
1550         make underlying_type SFINAE-friendly.
1551         (underlying_type): Derive from __underlying_type_impl.
1552         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
1553         test.
1554
1555         PR libstdc++/89446
1556         * include/bits/char_traits.h (__constant_char_array): Check index is
1557         in range before dereferencing.
1558         (char_traits<char>::compare, char_traits<char>::find)
1559         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
1560         immediately if n is zero.
1561         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
1562         Remove workarounds for PR 67026.
1563         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
1564         New test.
1565         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
1566         New test.
1567
1568 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
1569
1570         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
1571         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
1572
1573 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
1574
1575         PR libstdc++/89402
1576         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
1577         type to std::size_t and argument to type to long double.
1578
1579 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
1580
1581         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
1582         * config/abi/post/sparc64-linux-gnu: New directory.
1583         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
1584         * config/abi/post/sparc64-linux-gnu/32: New directory.
1585         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
1586
1587 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
1588
1589         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
1590         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
1591         test.
1592
1593 2019-02-22  Tom Honermann  <tom@honermann.net>
1594
1595         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
1596         printers for u8string and u8string_view.
1597
1598 2019-02-22  Tom Honermann  <tom@honermann.net>
1599
1600         * testsuite/18_support/byte/ops.cc: Validate
1601         std::to_integer<char8_t>, std::to_integer<char16_t>, and
1602         std::to_integer<char32_t>.
1603         * testsuite/18_support/numeric_limits/dr559.cc: Validate
1604         std::numeric_limits<char8_t>.
1605         * testsuite/18_support/numeric_limits/lowest.cc: Validate
1606         std::numeric_limits<char8_t>::lowest().
1607         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
1608         std::numeric_limits<char8_t>::max_digits10.
1609         * testsuite/18_support/type_info/fundamental.cc: Validate
1610         typeinfo for char8_t.
1611         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
1612         std::from_chars with char8_t.
1613         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
1614         Validate explicit instantiation of std::hash<char8_t>.
1615         * testsuite/20_util/is_integral/value.cc: Validate
1616         std::is_integral<char8_t>.
1617         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
1618         Validate std::make_signed<char8_t>.
1619         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
1620         Validate u8string construction from char8_t sources.
1621         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
1622         std::pmr::u8string.
1623         * testsuite/21_strings/basic_string_view/operations/compare/
1624         char/70483.cc: Validate substr operations on u8string_view.
1625         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
1626         the u8string_view typedef is defined.
1627         * testsuite/21_strings/char_traits/requirements/
1628         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
1629         member functions.
1630         * testsuite/21_strings/char_traits/requirements/
1631         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
1632         constexpr member functions.
1633         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
1634         that the u8string typedef is defined.
1635         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
1636         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
1637         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
1638         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
1639         numbers.
1640         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
1641         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
1642         Likewise.
1643         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
1644         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
1645         Validate std::atomic<char8_t>::is_always_lock_free
1646         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
1647         Update line numbers.
1648         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
1649         Likewise.
1650         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
1651         Likewise.
1652         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
1653         Validate std::experimental::pmr::u8string.
1654         * testsuite/experimental/string_view/typedefs.cc: Validate that the
1655         u8string_view typedef is defined.
1656         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
1657         char32_t to the typelists.
1658
1659 2019-02-22  Tom Honermann  <tom@honermann.net>
1660
1661         * include/ext/typelist.h: Constrain a partial specialization of
1662         typelist::detail::append_ to only match chain<T1,T2>.
1663
1664 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
1665
1666         PR libstdc++/89416
1667         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
1668         class template with class. Replace move and copy member types with
1669         member alias templates, so they are only instantiated when needed.
1670         (__is_copy_insertable, __is_move_insertable): Adjust base class.
1671         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
1672         test for C++11/14/17 as well.
1673         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
1674         test.
1675
1676 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
1677
1678         PR libstdc++/89402
1679         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
1680         _GLIBCXX_PURE to the alias declaration.
1681
1682 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
1683
1684         * testsuite/21_strings/basic_string/literals/types.cc
1685         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
1686         * testsuite/21_strings/basic_string/literals/values.cc
1687         [_GLIBCXX_USE_CHAR8_T]: Likewise.
1688         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
1689         potentially having different type.
1690         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
1691         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
1692         to char.
1693         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
1694         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
1695         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
1696         string literals only using basic character set.
1697         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
1698         u8 literals to char.
1699         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
1700         Test ATOMIC_CHAR8_T_LOCK_FREE.
1701         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
1702         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
1703         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
1704         * testsuite/experimental/string_view/literals/types.cc
1705         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
1706         literal.
1707         * testsuite/experimental/string_view/literals/values.cc
1708         [_GLIBCXX_USE_CHAR8_T]: Likewise.
1709
1710 2019-02-19  Tom Honermann  <tom@honermann.net>
1711
1712         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
1713         from char16_32_t.cc; validates numeric_limits<char8_t>.
1714         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
1715         test cloned from types.cc; validates operator""s for char8_t
1716         returns u8string.
1717         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
1718         test cloned from values.cc; validates construction and comparison
1719         of u8string values.
1720         * testsuite/21_strings/basic_string/requirements/
1721         /explicit_instantiation/char8_t/1.cc: New test cloned from
1722         char16_t/1.cc; validates explicit instantiation of
1723         basic_string<char8_t>.
1724         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
1725         New test cloned from types.cc; validates operator""sv for char8_t
1726         returns u8string_view.
1727         * testsuite/21_strings/basic_string_view/literals/
1728         values-char8_t.cc: New test cloned from values.cc; validates
1729         construction and comparison of u8string_view values.
1730         * testsuite/21_strings/basic_string_view/requirements/
1731         explicit_instantiation/char8_t/1.cc: New test cloned from
1732         char16_t/1.cc; validates explicit instantiation of
1733         basic_string_view<char8_t>.
1734         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
1735         New test cloned from char16_t/65049.cc; validates that
1736         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
1737         * testsuite/21_strings/char_traits/requirements/char8_t/
1738         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
1739         that char_traits<char8_t> member typedefs are present and correct.
1740         * testsuite/21_strings/char_traits/requirements/
1741         explicit_instantiation/char8_t/1.cc: New test cloned from
1742         char16_t/1.cc; validates explicit instantiation of
1743         char_traits<char8_t>.
1744         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
1745         from char16_t.cc: validates
1746         codecvt<char16_t, char8_t, mbstate_t>.
1747         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
1748         from char32_t.cc: validates
1749         codecvt<char32_t, char8_t, mbstate_t>.
1750         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
1751         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
1752         codecvt<char32_t, char8_t, std::mbstate_t>.
1753         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
1754         test cloned from string.cc; validates filesystem::path construction
1755         from char8_t input.
1756         * testsuite/experimental/feat-char8_t.cc: New test; validates that
1757         the __cpp_lib_char8_t feature test macro is defined with the
1758         correct value.
1759         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
1760         New test cloned from string.cc; validates filesystem::path
1761         construction from char8_t input.
1762         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
1763         test cloned from types.cc; validates operator""sv for char8_t
1764         returns u8string_view.
1765         * testsuite/experimental/string_view/literals/values-char8_t.cc:
1766         New test cloned from values.cc; validates construction and
1767         comparison of u8string_view values.
1768         * testsuite/experimental/string_view/requirements/
1769         explicit_instantiation/char8_t/1.cc: New test cloned from
1770         char16_t/1.cc; validates explicit instantiation of
1771         basic_string_view<char8_t>.
1772         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
1773         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
1774         enabled.
1775
1776 2019-02-19  Tom Honermann  <tom@honermann.net>
1777
1778         P0482R5 char8_t: Standard library support
1779         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
1780         typeinfo symbols for char8_t.
1781         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
1782         (GLIBCXX_3.4.26): Add symbols for specializations of
1783         numeric_limits and codecvt that involve char8_t.
1784         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
1785         * include/bits/atomic_base.h: Add atomic_char8_t.
1786         * include/bits/basic_string.h: Add std::hash<u8string> and
1787         operator""s(const char8_t*, size_t).
1788         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
1789         __cpp_lib_char8_t.
1790         * include/bits/char_traits.h: Add char_traits<char8_t>.
1791         * include/bits/codecvt.h: Add
1792         codecvt<char16_t, char8_t, mbstate_t>,
1793         codecvt<char32_t, char8_t, mbstate_t>,
1794         codecvt_byname<char16_t, char8_t, mbstate_t>, and
1795         codecvt_byname<char32_t, char8_t, mbstate_t>.
1796         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
1797         recognize char8_t as an integral type.
1798         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
1799         char8_t.
1800         (path::u8string): Return std::u8string when char8_t support is
1801         enabled.
1802         (path::generic_u8string): Likewise.
1803         (path::_S_convert): Handle conversion from char8_t input.
1804         (path::_S_str_convert): Likewise.
1805         * include/bits/functional_hash.h: Add hash<char8_t>.
1806         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
1807         char8_t.
1808         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
1809         for new char8_t specializations.
1810         * include/bits/localefwd.h: Add missing declarations of
1811         codecvt<char16_t, char, mbstate_t> and
1812         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
1813         codecvt<char16_t, char8_t, mbstate_t> and
1814         codecvt<char32_t, char8_t, mbstate_t>.
1815         * include/bits/postypes.h: Add u8streampos
1816         * include/bits/stringfwd.h: Add declarations of
1817         char_traits<char8_t> and u8string.
1818         * include/c_global/cstddef: Add __byte_operand<char8_t>.
1819         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
1820         Recognize char8_t.
1821         (path::u8string): Return std::u8string when char8_t support is
1822         enabled.
1823         (path::generic_u8string): Likewise.
1824         (path::_S_convert): Handle conversion from char8_t input.
1825         (path::_S_str_convert): Likewise.
1826         * include/experimental/string: Add u8string.
1827         * include/experimental/string_view: Add u8string_view,
1828         hash<experimental::u8string_view>, and
1829         operator""sv(const char8_t*, size_t).
1830         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
1831         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
1832         as a character type.
1833         * include/std/limits: Add numeric_limits<char8_t>.
1834         * include/std/string_view: Add u8string_view,
1835         hash<experimental::u8string_view>, and
1836         operator""sv(const char8_t*, size_t).
1837         * include/std/type_traits: Add __is_integral_helper<char8_t>,
1838         __make_unsigned<char8_t>, and __make_signed<char8_t>.
1839         * libsupc++/atomic_lockfree_defines.h: Define
1840         ATOMIC_CHAR8_T_LOCK_FREE.
1841         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
1842         codecvt.cc and limits.cc so that char8_t specializations of
1843         numeric_limits and codecvt and emitted.
1844         * src/c++11/Makefile.in: Likewise.
1845         * src/c++11/codecvt.cc: Define members of
1846         codecvt<char16_t, char8_t, mbstate_t>,
1847         codecvt<char32_t, char8_t, mbstate_t>,
1848         codecvt_byname<char16_t, char8_t, mbstate_t>, and
1849         codecvt_byname<char32_t, char8_t, mbstate_t>.
1850         * src/c++11/limits.cc: Define members of
1851         numeric_limits<char8_t>.
1852         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
1853         locale_init.cc and localename.cc.
1854         * src/c++98/Makefile.in: Likewise.
1855         * src/c++98/locale_init.cc: Add initialization for the
1856         codecvt<char16_t, char8_t, mbstate_t> and
1857         codecvt<char32_t, char8_t, mbstate_t> facets.
1858         * src/c++98/localename.cc: Likewise.
1859         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
1860
1861 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
1862
1863         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
1864         * 27_io/filesystem/operations/resize_file.cc: Likewise.
1865         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
1866
1867 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
1868
1869         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
1870         * doc/html/*: Regenerate.
1871
1872         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
1873         * doc/html/*: Regenerate.
1874
1875         * doc/xml/manual/intro.xml: Document LWG 2586 status.
1876         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
1877         allocator type in is_constructible checks.
1878         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
1879         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
1880         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
1881         problematic type from LWG 2586 discussion.
1882         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
1883         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
1884
1885         * configure.ac: Check for C11 timespec_get function.
1886         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
1887         (openbsd): Likewise
1888         * config.h.in: Regenerate.
1889         * configure: Regenerate.
1890         * include/c_global/ctime (timespec, timespec_get): Add to namespace
1891         std for C++17 and up.
1892
1893         * doc/xml/manual/intro.xml: Document LWG 2537 status.
1894         * include/bits/stl_queue.h
1895         (priority_queue(const Compare&, const Container&, const Alloc&))
1896         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
1897         make_heap.
1898         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
1899
1900         * doc/xml/manual/intro.xml: Document LWG 2566 status.
1901         * include/bits/stl_queue.h (queue, priority_queue): Add static
1902         assertions to enforce LWG 2566 requirement on value_type.
1903         * include/bits/stl_stack.h (stack): Likewise.
1904
1905         PR middle-end/89303
1906         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
1907
1908         * doc/xml/manual/intro.xml: Document LWG 2735 status.
1909         * include/bits/std_abs.h: Add comment about LWG 2735.
1910         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
1911
1912 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
1913
1914         PR libstdc++/89345
1915         * include/std/version [__cpp_impl_destroying_delete]
1916         (__cpp_lib_destroying_delete): Only define for C++2a and later.
1917         * libsupc++/new [__cpp_impl_destroying_delete]
1918         (__cpp_lib_destroying_delete): Likewise.
1919         (destroying_delete_t, destroying_delete): Likewise, but define even
1920         when __cpp_impl_destroying_delete is not defined.
1921         * testsuite/18_support/destroying_delete.cc: New test.
1922
1923 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
1924
1925         PR libstdc++/89023
1926         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
1927         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
1928         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
1929         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
1930
1931 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
1932
1933         PR libstdc++/71044
1934         * include/bits/fs_path.h (path::has_root_name)
1935         (path::has_root_directory, path::has_root_path)
1936         (path::has_relative_path, path::has_parent_path)
1937         (path::has_filename, path::has_stem, path::has_extension)
1938         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
1939         noexcept.
1940         * src/c++17/fs_path.cc (path::has_root_name)
1941         (path::has_root_directory, path::has_root_path)
1942         (path::has_relative_path, path::has_parent_path)
1943         (path::has_filename, path::_M_find_extension): Add noexcept.
1944
1945 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
1946
1947         PR libstdc++/89102 (partial)
1948         * include/std/type_traits (common_type<>): Define.
1949         (common_type<T>): Derive from common_type<T, T>.
1950         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
1951         Test zero-length template argument list.
1952         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
1953         Test additional single argument cases.
1954         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
1955         Adjust expected error.
1956
1957 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
1958
1959         PR libstdc++/89128
1960         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
1961         guides.
1962         * include/bits/stl_stack.h (stack): Likewise.
1963         * testsuite/23_containers/priority_queue/deduction.cc: New test.
1964         * testsuite/23_containers/queue/deduction.cc: New test.
1965         * testsuite/23_containers/stack/deduction.cc: New test.
1966
1967         PR libstdc++/89194
1968         * include/std/type_traits (__is_convertible_helper)
1969         (__is_convertible_helper<_From, _To, false>): Revert changes to
1970         support is_nothrow_convertible.
1971         (__is_nt_convertible_helper): New helper.
1972         (is_nothrow_convertible): Use __is_nt_convertible_helper.
1973
1974         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
1975         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
1976
1977         PR libstdc++/89130
1978         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
1979         __is_alloc_insertable_impl. Replace single type member with two
1980         members, one for each of copy and move insertable.
1981         (__is_move_insertable): New trait for internal use.
1982         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
1983         (vector::_S_nothrow_relocate(true_type)): New functions to
1984         conditionally check if __relocate_a can throw.
1985         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
1986         on __is_move_insertable.
1987         (vector::_S_do_relocate): New overloaded functions to conditionally
1988         call __relocate_a.
1989         (vector::_S_relocate): New function that dispatches to _S_do_relocate
1990         based on _S_use_relocate.
1991         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
1992         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
1993         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
1994
1995         PR libstdc++/89090
1996         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
1997         parameter unnamed. Add message to static assertion.
1998         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
1999         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
2000         in C++11 code.
2001
2002 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
2003
2004         PR libstdc++/87106
2005         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
2006         Rename...
2007         (__is_bitwise_relocatable): ... to this.
2008         (__relocate_a_1): Adapt.
2009         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
2010         (__is_bitwise_relocatable): ... to this.
2011
2012 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
2013
2014         PR libstdc++/89117
2015         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
2016         final component as well as from _M_pathname. Append the dot using
2017         operator+= instead of only to _M_pathname.
2018         (path::_M_find_extension): Reformat slightly.
2019         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
2020         Add more test cases.
2021
2022 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
2023
2024         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
2025
2026 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
2027
2028         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
2029         constexpr specifiers from arg and proj.
2030
2031         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
2032         __shared_ptr instantiations used by gcc4-compatible ABI.
2033
2034         * include/experimental/forward_list (experimental::erase): Qualify
2035         call to erase_if.
2036         * include/experimental/list (experimental::erase): Likewise.
2037         * include/std/forward_list (std::erase): Likewise.
2038         * include/std/list (std::erase): Likewise.
2039
2040         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
2041         C++2a.
2042         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
2043         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
2044         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
2045         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
2046         * testsuite/ext/array_allocator/26875.cc: Likewise.
2047         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
2048         * testsuite/util/replacement_memory_operators.h: Likewise.
2049         * testsuite/util/testsuite_allocator.h: Likewise.
2050
2051         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
2052         normal mode vector, even for debug mode.
2053         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
2054         Define alias template for normal mode vector.
2055
2056 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
2057
2058         PR libstdc++/68737
2059         * config/locale/generic/c_locale.h (__convert_from_v)
2060         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
2061         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
2062         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
2063         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
2064
2065 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
2066
2067         PR libstdc++/88840
2068         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
2069         data member with static member function _S_use_relocate().
2070         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
2071         (vector::_M_default_append): Use _S_use_relocate() instead of
2072         __use_relocate.
2073
2074         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
2075         sign of results.
2076
2077 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
2078
2079         PR libstdc++/88740
2080         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
2081         write to stderr instead of using printf.
2082
2083 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
2084
2085         PR libstdc++/86590
2086         * include/bits/char_traits.h (__constant_string_p,
2087         __constant_char_array_p): Use __builtin_is_constant_evaluated if
2088         available.
2089
2090 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
2091
2092         Implement C++20 P0600r1.
2093         * include/backward/hash_map: Add nodiscard attribute to empty.
2094         * include/backward/hash_set: Likewise.
2095         * backward/hashtable.h: Likewise.
2096         * include/bits/basic_string.h: Likewise.
2097         * include/bits/forward_list.h: Likewise.
2098         * include/bits/hashtable.h: Likewise.
2099         * include/bits/regex.h: Likewise.
2100         * include/bits/stl_deque.h: Likewise.
2101         * include/bits/stl_list.h: Likewise.
2102         * include/bits/stl_map.h: Likewise.
2103         * include/bits/stl_multimap.h: Likewise.
2104         * include/bits/stl_multiset.h: Likewise.
2105         * include/bits/stl_queue.h: Likewise.
2106         * include/bits/stl_set.h: Likewise.
2107         * include/bits/stl_stack.h: Likewise.
2108         * include/bits/stl_tree.h: Likewise.
2109         * include/bits/stl_vector.h: Likewise.
2110         * include/bits/unordered_map.h: Likewise.
2111         * include/bits/unordered_set.h: Likewise.
2112         * include/debug/array: Likewise.
2113         * include/experimental/any: Likewise.
2114         * include/experimental/bits/fs_path.h: Likewise.
2115         * include/experimental/internet: Likewise.
2116         * include/experimental/string_view: Likewise.
2117         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
2118         Likewise.
2119         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
2120         Likewise.
2121         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
2122         Likewise.
2123         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
2124         Likewise.
2125         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
2126         Likewise.
2127         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
2128         Likewise.
2129         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
2130         Likewise.
2131         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
2132         Likewise.
2133         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
2134         info_fn_imps.hpp: Likewise.
2135         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
2136         left_child_next_sibling_heap_.hpp: Likewise.
2137         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
2138         Likewise.
2139         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
2140         Likewise.
2141         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
2142         Likewise.
2143         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
2144         Likewise.
2145         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
2146         Likewise.
2147         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
2148         Likewise.
2149         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
2150         Likewise.
2151         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
2152         * include/ext/pb_ds/trie_policy.hpp: Likewise.
2153         * include/ext/rope: Likewise.
2154         * include/ext/slist: Likewise.
2155         * include/ext/vstring.h: Likewise.
2156         * include/profile/array: Likewise.
2157         * include/std/array: Likewise.
2158         * include/tr1/array: Likewise.
2159         * include/tr1/hashtable.h: Likewise.
2160         * include/tr1/regex: Likewise.
2161         * include/tr2/dynamic_bitset: Likewise.
2162         * include/bits/alloc_traits.h: Add nodiscard attribute to
2163         allocate.
2164         * include/experimental/memory_resource: Likewise.
2165         * include/ext/alloc_traits.h: Likewise.
2166         * include/ext/array_allocator.h: Likewise.
2167         * include/ext/bitmap_allocator.h: Likewise.
2168         * include/ext/debug_allocator.h: Likewise.
2169         * include/ext/extptr_allocator.h: Likewise.
2170         * include/ext/mt_allocator.h: Likewise.
2171         * include/ext/new_allocator.h: Likewise.
2172         * include/ext/pool_allocator.h: Likewise.
2173         * include/ext/throw_allocator.h: Likewise.
2174         * include/std/scoped_allocator: Likewise.
2175         * libsupc++/eh_alloc.cc: Likewise.
2176         * include/std/future: Add nodiscard attribute to async.
2177         * libsupc++/new: Add nodiscard attribute to new.
2178
2179 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
2180
2181         PR libstdc++/87514
2182         PR libstdc++/87520
2183         PR libstdc++/88782
2184         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
2185         * include/bits/shared_ptr.h
2186         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
2187         (allocate_shared): Change to use new tag type.
2188         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
2189         Declare new member function.
2190         (_Sp_alloc_shared_tag): Define new type.
2191         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
2192         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
2193         _Sp_make_shared_tag::_S_eq to check type_info.
2194         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
2195         Constrain to prevent being called with _Sp_alloc_shared_tag.
2196         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
2197         Replace constructor with ...
2198         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
2199         reference parameter so address of the new object can be returned to
2200         the caller. Obtain the allocator from the tag type.
2201         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
2202         constructor with ...
2203         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
2204         to the __shared_count constructor.
2205         (__allocate_shared): Change to use new tag type.
2206         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
2207
2208 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
2209
2210         * src/c++17/fs_ops.cc
2211         (equivalent(const path&, const path&, error_code&))
2212         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
2213         compare files instead of relying on incomplete info returned by stat.
2214
2215         PR libstdc++/88884
2216         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
2217         if the path is already absolute.
2218         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
2219         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
2220
2221         PR libstdc++/88881
2222         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
2223         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
2224         of filesystem::exists.
2225         (create_directories(const path&, error_code&)): Add assertions.
2226         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
2227         Add workaround for bug in _wstat for paths with trailing slash.
2228         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
2229         for expected behaviour on mingw.
2230         * testsuite/experimental/filesystem/operations/create_directories.cc:
2231         Likewise.
2232         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
2233         "TMP" instead of "TMPDIR" and clean environment before each test. Do
2234         not test permissions on mingw targets.
2235
2236 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
2237
2238         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
2239         constructors and open members taking wide strings. Fix patterns for
2240         filesystem::path members to match wstring_view parameters. Add
2241         exports for shared_ptr members used by directory iterators.
2242         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
2243         error code parameter if the file doesn't exist.
2244         * src/filesystem/ops.cc (remove(const path&, error_code&)):
2245         Likewise.
2246         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
2247         values for mingw targets, where "/" is not an absolute path. Do not
2248         test symlinks on mingw targets.
2249         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
2250         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
2251         on mingw targets.
2252         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
2253         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
2254         that each component of the path is created.
2255         * testsuite/experimental/filesystem/operations/create_directories.cc:
2256         Likewise.
2257         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
2258         permissions on mingw targets.
2259         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
2260         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
2261         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
2262         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
2263         mingw targets.
2264         * testsuite/experimental/filesystem/operations/permissions.cc:
2265         Likewise.
2266         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
2267         symlinks or permissions on mingw targets.
2268         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
2269         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
2270         symlinks on mingw targets.
2271         * testsuite/experimental/filesystem/operations/remove_all.cc:
2272         Likewise.
2273         * testsuite/27_io/filesystem/operations/status.cc: Do not test
2274         permissions on mingw targets.
2275         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
2276         test symlinks on mingw targets.
2277         * testsuite/experimental/filesystem/operations/space.cc: Fix test
2278         for mingw targets.
2279
2280 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
2281
2282         PR libstdc++/88738
2283         Warn about unused comparisons of shared_ptr/unique_ptr
2284         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
2285         * include/bits/shared_ptr.h: Use it for operator ==, !=,
2286         <, <=, >, >= for shared_ptr.
2287         * include/bits/unique_ptr.h: Likewise for unique_ptr.
2288
2289 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
2290
2291         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
2292         as 201611L, because P0497R0 changes are supported.
2293         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
2294
2295         * include/bits/erase_if.h [__cplusplus > 201703L]
2296         (__cpp_lib_erase_if): Only define for C++2a.
2297         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
2298         (__cpp_lib_null_iterators): Define.
2299         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
2300         (__cpp_lib_null_iterators): Define.
2301         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
2302
2303         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
2304         status.
2305         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
2306         Define.
2307         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
2308         changes are supported.
2309         * include/std/optional (__cpp_lib_optional): Likewise.
2310         * include/std/variant (__cpp_lib_variant): Likewise.
2311         * include/std/version [!__STRICT_ANSI__]
2312         (__cpp_lib_uncaught_exceptions): Define as long integer.
2313         [__cplusplus >= 201703L] (__cpp_lib_any)
2314         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
2315         (__cpp_lib_variant): Define for C++17.
2316         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
2317         as long integer.
2318         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
2319         integer.
2320
2321         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
2322
2323 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
2324
2325         PR libstdc++/88811
2326         PR libstdc++/83306
2327         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
2328         before second path.
2329         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
2330         test.
2331
2332 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
2333
2334         * doc/xml/manual/intro.xml: Include new section.
2335         * doc/xml/manual/status_cxx2017.xml: Document more
2336         implementation-defined properties of the library.
2337         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
2338         * doc/html/*: Regenerate.
2339
2340         * include/bits/refwrap.h [__cplusplus > 201703L]
2341         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
2342         (_Reference_wrapper_base_memfun): Do not define for C++2a.
2343         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
2344         for C++2a.
2345         (reference_wrapper::operator()): Add static assertion.
2346         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
2347
2348         * include/std/chrono (duration_values::zero(), duration_values::min())
2349         (duration_values::max()): Add noexcept.
2350         (duration::zero(), duration::min(), duration::max()): Likewise.
2351         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
2352         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
2353         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
2354
2355         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
2356
2357 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
2358
2359         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
2360         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
2361
2362 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
2363
2364         PR libstdc++/88802
2365         * include/bits/functional_hash.h (hash<nullptr_t>): Define
2366         specialization for C++17 (P0513R0, LWG 2817).
2367         * testsuite/20_util/hash/nullptr.cc: New test.
2368
2369         PR libstdc++/88125
2370         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
2371         pattern for std::basic_stringbuf::str().
2372
2373         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
2374         basic_ostream::operator<< patterns.
2375
2376 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
2377
2378         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
2379         test failures on targets with 32-bit time_t.
2380
2381         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
2382         * include/std/deque: Likewise.
2383         * include/std/forward_list: Likewise.
2384         * include/std/list: Likewise.
2385         * include/std/string: Likewise.
2386         * include/std/vector: Likewise.
2387         * include/std/version: Likewise.
2388         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
2389         * testsuite/23_containers/deque/erasure.cc: Likewise.
2390         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
2391         * testsuite/23_containers/list/erasure.cc: Likewise.
2392         * testsuite/23_containers/map/erasure.cc: Likewise.
2393         * testsuite/23_containers/set/erasure.cc: Likewise.
2394         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
2395         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
2396         * testsuite/23_containers/vector/erasure.cc: Likewise.
2397
2398         * include/experimental/internet [AI_NUMERICSERV]
2399         (resolver_base::numeric_service): Define conditionally.
2400         * testsuite/experimental/net/internet/resolver/base.cc: Test it
2401         conditionally.
2402         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2403         Likewise.
2404
2405 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
2406             Jonathan Wakely  <jwakely@redhat.com>
2407
2408         Implement LWG 2221
2409         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
2410         (GLIBCXX_3.4.26): Add new exports.
2411         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
2412         correct list of sources.
2413         * include/Makefile.in: Regenerate.
2414         * include/std/ostream (operator<<(nullptr_t)): New member function.
2415         * src/c++17/ostream-inst.cc: New file.
2416         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
2417         test.
2418
2419 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
2420
2421         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
2422         of the source file containing the caller.
2423         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
2424         directories created by test.
2425         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
2426         Likewise.
2427         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
2428         Likewise.
2429         * testsuite/experimental/filesystem/iterators/
2430         recursive_directory_iterator.cc: Likewise.
2431
2432 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
2433
2434         PR tree-optimization/88775
2435         * include/bits/stl_function.h (greater<_Tp*>::operator(),
2436         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
2437         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
2438         instead of __builtin_constant_p if available.  Don't bother with
2439         the pointer comparison in C++11 and earlier.
2440
2441 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
2442
2443         PR other/16615
2444
2445         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
2446         with "cannot".
2447
2448 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
2449
2450         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
2451         for filesystem::path. Give variables more distinctive names.
2452
2453         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
2454         member function to perform non-trivial assignment.
2455         (_Optional_payload_base::_M_move_assign): Likewise.
2456         (_Optional_payload<T, true, false, true>::operator=)
2457         (_Optional_payload<T, true, true, false>::operator=)
2458         (_Optional_payload<T, true, false, false>::operator=): Call
2459         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
2460
2461         PR libstdc++/88204
2462         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
2463         test std::complex<long double> if long double format is IBM128.
2464         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
2465         Likewise.
2466
2467 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
2468
2469         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
2470         for old std::unique_ptr layout.
2471         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
2472         to become valueless. Add filesystem::path tests.
2473
2474         PR libstdc++/87855
2475         * include/std/optional (_Optional_payload_base): New class template
2476         for common code hoisted from _Optional_payload specializations. Use
2477         a template for the union, to allow a partial specialization for
2478         types with non-trivial destructors. Add constructors for in-place
2479         initialization to the union.
2480         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
2481         to perform non-trivial copy construction, instead of relying on
2482         non-standard copy elision in a delegating constructor.
2483         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
2484         non-trivial move construction.
2485         (_Optional_payload): Derive from _Optional_payload_base and use it
2486         for everything except the non-trivial assignment operators, which are
2487         defined as needed.
2488         (_Optional_payload<false, C, M>): Derive from the specialization
2489         _Optional_payload<true, false, false> and add a destructor.
2490         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
2491         Forward to corresponding members of _Optional_payload.
2492         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
2493         Hoist common members from _Optional_base.
2494         (_Optional_base): Make all members and base class public.
2495         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
2496         _Optional_base_impl.
2497         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
2498         support for new std::optional layout.
2499         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
2500
2501         PR libstdc++/88066
2502         * include/bits/locale_conv.h: Use <> for includes not "".
2503         * include/ext/random: Likewise.
2504         * include/ext/vstring.h: Likewise.
2505
2506 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2507
2508         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
2509         (GLIBCXX_3.4.21): Likewise.
2510
2511 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
2512
2513         PR libstdc++/88749
2514         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
2515         to match the one that controls whether utimbuf and utime are declared.
2516
2517 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
2518
2519         PR libstdc++/87787
2520         * include/bits/char_traits.h (char_traits::move): Do not pass null
2521         pointers to memmove.
2522         * include/bits/locale_facets.h
2523         (ctype<char>::widen(const char*, const char*, char*)): Do not
2524         pass null pointers to memcpy.
2525         (ctype<char>::narrow(const char*, const char*, char, char*)):
2526         Likewise.
2527         (ctype<char>::do_widen(const char*, const char*, char*)):
2528         Likewise.
2529         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
2530         Likewise.
2531
2532         * doc/xml/manual/spine.xml: Update copyright years.
2533         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
2534         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
2535         for C++17 filesystem library.
2536         * doc/html/*: Regenerate.
2537
2538         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
2539         * config.h.in: Regenerate.
2540         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
2541         alphabetically and add missing entries for copy_symlink,
2542         hard_link_count, rename, and resize_file.
2543         * configure: Regenerate.
2544         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
2545         used unconditionally.
2546         * src/filesystem/ops-common.h (__gnu_posix::truncate)
2547         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
2548         supports truncating to zero length.
2549         * testsuite/27_io/filesystem/operations/all.cc: New test.
2550         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
2551
2552 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
2553
2554         PR libstdc++/86756
2555         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
2556         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
2557         * config.h.in: Regenerate.
2558         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
2559         remaining std::filesystem types and functions.
2560         * configure: Regenerate.
2561         * src/c++17/Makefile.am: Add C++17 filesystem sources.
2562         * src/c++17/Makefile.in: Regenerate.
2563         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
2564         here, and change name of included file.
2565         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
2566         here, and change name of included file.
2567         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
2568         path to dir-common.h.
2569         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
2570         path to ops-common.h. Disable -Wunused-parameter warnings.
2571         (internal_file_clock): Define unconditionally.
2572         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
2573         define.
2574         (do_copy_file, do_space): Move definitions to ops.common.h.
2575         (copy, file_size, hard_link_count, last_write_time, space): Only
2576         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
2577         report an error.
2578         (last_write_time, read_symlink): Remove unused attributes from
2579         parameters.
2580         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
2581         * src/filesystem/Makefile.in: Regenerate.
2582         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
2583         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
2584         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
2585         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
2586         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
2587         dummy types and functions instead of using #error.
2588         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
2589         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
2590         in terms of stat.
2591         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
2592         (do_copy_file, do_space): Move definitions here from std-ops.cc.
2593         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
2594         to account for new namespace.
2595         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
2596         -lstdc++fs from dg-options.
2597         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
2598         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
2599         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
2600         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
2601         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
2602         Likewise.
2603         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
2604         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
2605         Likewise.
2606         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
2607         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
2608         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
2609         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
2610         * testsuite/27_io/filesystem/operations/create_directories.cc:
2611         Likewise.
2612         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
2613         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
2614         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
2615         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
2616         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
2617         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
2618         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
2619         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
2620         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
2621         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
2622         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
2623         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
2624         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
2625         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
2626         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
2627         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2628         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
2629         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2630         Likewise.
2631         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
2632
2633
2634         PR libstdc++/86756
2635         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
2636         typeinfo and vtables less greedy.
2637         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
2638         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
2639         * src/c++17/Makefile.in: Regenerate.
2640         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
2641         here, and change name of included file.
2642         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
2643         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
2644         from sources.
2645         * src/filesystem/Makefile.in: Regenerate.
2646         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
2647         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
2648         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
2649         from dg-options and remove dg-require-filesystem-ts.
2650         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
2651         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
2652         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
2653         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
2654         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
2655         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
2656         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
2657         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
2658         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
2659         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
2660         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
2661         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
2662         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
2663         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
2664         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
2665         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
2666         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
2667         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
2668         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
2669         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
2670         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
2671         Likewise.
2672         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
2673         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
2674         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
2675         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
2676         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
2677         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
2678         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
2679         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
2680         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
2681         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
2682         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
2683         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
2684         Likewise.
2685         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
2686         Likewise.
2687         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
2688         Likewise.
2689         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
2690         Likewise.
2691         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
2692         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
2693         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
2694         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
2695         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
2696         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
2697         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
2698         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
2699         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
2700         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
2701         Likewise.
2702         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
2703         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
2704         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
2705         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
2706         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
2707
2708         PR libstdc++/87431
2709         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
2710         Check is_trivially_copyable instead of is_scalar.
2711         (variant::emplace<N, Args>(Args&&...)): If construction of the new
2712         contained value can throw and its type is trivially copyable then
2713         construct into a temporary variant and move from it, to provide the
2714         strong exception safety guarantee.
2715         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
2716         Likewise.
2717         * testsuite/20_util/variant/87431.cc: New test.
2718         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
2719         conversion causes valueless state.
2720
2721         PR libstdc++/88607
2722         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
2723         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
2724         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
2725         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
2726         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
2727
2728 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
2729
2730         * include/bits/fs_fwd.h (__file_clock): Define new clock.
2731         (file_time_type): Redefine in terms of __file_clock.
2732         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
2733         overflow.
2734         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
2735         internal linkage.
2736         (internal_file_lock): New helper type for accessing __file_clock.
2737         (do_copy_file): Use internal_file_lock to convert system time to
2738         file_time_type.
2739         (last_write_time(const path&, error_code&)): Likewise.
2740         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
2741
2742 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
2743
2744         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
2745         for const member functions of std::basic_string.
2746         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
2747         in C++17.
2748         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
2749         Make non-standard constructor private.
2750         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
2751         Likewise.
2752         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
2753         explicit instantiations for C++17 as well as earlier dialects.
2754         * src/c++17/Makefile.am: Add new source files.
2755         * src/c++17/Makefile.in: Regenerate.
2756         * src/c++17/cow-string-inst.cc: New file defining explicit
2757         instantiations for basic_string member functions added in C++17.
2758         * src/c++17/string-inst.cc: Likewise.
2759
2760         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
2761         copy/move constructors for old std::basic_string.
2762         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
2763         (basic_string::reference, basic_string::const_reference): Define
2764         as plain references for C++11 and later.
2765         (basic_string::basic_string()): Put constructor body outside
2766         preprocessor conditional groups.
2767         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
2768         instead of copying it.
2769         (basic_string::basic_string(const basic_string&, const _Alloc&)):
2770         Define.
2771         (basic_string::basic_string(basic_string&&, const _Alloc&)):
2772         Define.
2773         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
2774         cases for old basic_string.
2775         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
2776         allocator-extended constructors unconditionally. Add extra members to
2777         allocator type when using old string ABI.
2778         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
2779         for old string ABI.
2780         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
2781
2782         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
2783         -fno-inline added to test flags.
2784
2785         * testsuite/21_strings/basic_string/requirements/
2786         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
2787
2788         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
2789         assertion failures with old std::string ABI.
2790
2791         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
2792         with ...
2793         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
2794         functions that will only erase elements at the end.
2795         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
2796         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
2797         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
2798         of erase(p, end()).
2799         (path::_List::pop_back()): Define.
2800         (path::_List::_M_erase_from(const_iterator)): Define.
2801         (path::operator/=(const path&)): Use pop_back to remove last component
2802         and _M_erase_from to remove multiple components.
2803         (path::_M_append(basic_string_view<value_type>)): Likewise.
2804         (path::operator+=(const path&)): Likewise.
2805         (path::_M_concat(basic_string_view<value_type>)): Likewise.
2806         (path::remove_filename()): Likewise.
2807         (path::lexically_normal()): Use _List::_Impl iterators instead of
2808         path::iterator. Use pop_back to remove components from the end. Clear
2809         trailing filename, instead of using erase(const_iterator) to remove
2810         a non-final component.
2811         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
2812         additional cases.
2813         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
2814
2815         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
2816         incorrect treatment of empty filename after trailing slash.
2817         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
2818
2819         * testsuite/21_strings/basic_string/modifiers/assign/char/
2820         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
2821         to test flags.
2822         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
2823         move_assign_optim.cc: Likewise.
2824
2825 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
2826             Jakub Jelinek  <jakub@redhat.com>
2827
2828         PR libstdc++/88607
2829         * include/experimental/memory: Replace UTF-8 quote characters.
2830         * include/std/future: Replace UTF-8 "em dash" characters.
2831
2832 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
2833
2834         PR libstdc++/88607
2835         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
2836         * include/debug/forward_list: Likewise.
2837         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
2838         character.
2839         * include/experimental/chrono: Likewise.
2840         * include/experimental/functional: Likewise.
2841         * include/experimental/ratio: Likewise.
2842         * include/experimental/system_error: Likewise.
2843         * include/experimental/tuple: Likewise.
2844         * include/experimental/type_traits: Likewise.
2845         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
2846         * include/parallel/multiseq_selection.h: Likewise.
2847
2848         PR libstdc++/88681
2849         * config/abi/pre/gnu.ver: Add missing exports.
2850         * testsuite/22_locale/collate_byname/88681.cc: New test.
2851         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
2852         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
2853
2854 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
2855
2856         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
2857         initializer_list<value_type> and from input iterator ranges.
2858         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
2859
2860         * testsuite/experimental/string_view/element_access/char/empty.cc:
2861         Fix year range in copyright header.
2862
2863 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
2864
2865         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
2866         Fix year range in copyright header.
2867
2868 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
2869
2870         Update copyright years.
2871 \f
2872 Copyright (C) 2019 Free Software Foundation, Inc.
2873
2874 Copying and distribution of this file, with or without modification,
2875 are permitted in any medium without royalty provided the copyright
2876 notice and this notice are preserved.